Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . rsal articulations contributing to this end; the jar beingbroken thereby before it is transmitted to the limb. This pro-vision is still further developed in the feet of certain animals,like the cats, which bound after their prey; in addition tothe elasticity of the tarsus and metatarsus, their feet are sup-plied with elastic pads, to break the shocks occasioned by theirspringing habits. [§ 269. THE SCAPULAE, like the pelvic arch, consists
Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . rsal articulations contributing to this end; the jar beingbroken thereby before it is transmitted to the limb. This pro-vision is still further developed in the feet of certain animals,like the cats, which bound after their prey; in addition tothe elasticity of the tarsus and metatarsus, their feet are sup-plied with elastic pads, to break the shocks occasioned by theirspringing habits. [§ 269. THE SCAPULAE, like the pelvic arch, consists of threepair of bones, the scapula, the coracoid and the clavicle,which are the homologues of the ilium, the ischium, and thepubis ; early in life, in man, the coracoid becomes soldered tothe scapula, and is described as a process of the latter bone,but it exists as a distinct element of the scapular arch in rep-tiles and birds, and in the ornythorhyncus among the mono-trematous mammalia. Fig. 144 shews the right half of the scapular arch of manzw 142 BOXES OF THE SHOULDER. situ. The clavicle (1) is seen resting its internal head upon the Fisr. first bone of the sternum,and having its externalend attached by ligamentsto the acromion processof the scapula ; the clavi-cle maintains the shoulderat a fixed distance fromthe trunk. [§ 2/0. THE SCAPULAis a large flat bone, situ-ated on the upper andexternal part of the is of a triangularform, and at its upper . •*• Land external angle expands to form a shallow cavity, called Fig. 145. Fig. 146.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1870
